[Ocean Summary] February 15th to 21st, 2026

2026/02/26 15:59

#Pressure distribution and waves
On the 15th, a low pressure system with a front moved eastward near the southern coast of Honshu and Hokkaido. At night, the wave height is 2 to 3 meters on the continental side of the central Japan Sea.
On the 16th, a low pressure system developed near the Chishima Islands, and the area around Japan became winter-like. North winds have strengthened, and wave heights are around 3m in wide areas of Japan.
On the 17th, a low pressure system off the coast of Kanto moved slowly eastward. Wave height around 3m near the Izu Islands.
From the 18th to the 19th, a low-pressure system west of Hokkaido developed and moved toward the waters near the Chishima Islands. From the night of the 18th to the 19th, waves exceeded 4 meters in height off the coast of the Noto Peninsula and west of Hokkaido, and on the night of the 19th, waves exceeded 6 meters in height off the coast of Sanriku.
From the 20th to the 21st, the area around Honshu was covered with high pressure, and the waves gradually became calmer.



#Sea surface temperature
Sea surface temperatures in the Japanese waters continued to be at normal levels.
The East China Sea remained in slightly high waters, while the waters near the Nansei Islands continued to be at normal levels.
South of Japan was at a normal level, and waters off the coast of the Tokai region continued to be slightly lower than normal.
East of Kanto, sea areas continue to be at normal levels.
The western part of the coast of Sanriku continued to be below normal, while the eastern part continued to be above normal.
The temperature off the southeast coast of Hokkaido was higher than normal, up to 3c higher.
Sea ice remained stagnant during this period in the waters around the Kuril Islands and the Sea of Okhotsk.

There will be a total lunar eclipse on March 3rd (Tuesday). What will the weather be like on that day

2026/02/26 13:55

A total lunar eclipse will occur next week on Tuesday night, March 3rd. This lunar eclipse is a phenomenon that can be seen throughout Japan at the same time, and occurs at times when it is easy to observe.
It begins to fade in the eastern sky at 18:50, and becomes a total eclipse at 20:04.
The total eclipse will end at 21:03, and the missing part will gradually become smaller, and the partial eclipse will end in the southeastern sky at 22:18.



As for the weather on Tuesday, March 3rd, clouds are likely to spread in many areas due to the influence of a low pressure system moving near the southern coast of Japan.
On that day, the weather is expected to deteriorate from the west, and there will be periods of rain from Okinawa to southern Tohoku. Depending on the time zone when the clouds spread, there is a possibility that there will be periods of sunshine in Okinawa, Kyushu, northern Tohoku, and Hokkaido.





However, March 3rd (Tuesday) is a little further away, so the forecast may change. Check the latest weather forecast.

A ``lunar eclipse'' is a phenomenon in which the full moon passes through the Earth's shadow, making it appear darker or eclipsed. A "total lunar eclipse" is a phenomenon in which the entire full moon, rather than just a portion of it, becomes dark.
The total eclipse of the moon appears reddish-black, a color known as ``red copper.''
This is the first total lunar eclipse that can be seen across Japan since September 8, 2025. The next total lunar eclipse to be seen across Japan will be on January 1, 2029.

Higher than normal weather expected through Saturday, 28th of the month Spring weather is in full swing in various places

2026/02/26 06:49

Today, the 26th (Thursday), there will be many places where the sun will reach during the day, and the weather will be as sunny as in March and April. On the other hand, on the Pacific side of the Kanto and Tohoku regions, winds blow from the north, so the temperature rises slowly and is likely to be typical of this time of year.

The predicted maximum temperature is Sapporo: 4c, Sendai: 7c, Tokyo: 13c, Nagoya: 19c, Kanazawa: 14c, Osaka: 17c, Kochi: 20c, Fukuoka: 18c.

In the Kanto and Tohoku regions, there is little sunlight, so it can feel cool during the day. Please stay warm.



From now on until the 28th (Saturday) of the month, temperatures will be high in various places, and the weather will be full of spring weather.
The maximum temperature in central Tokyo on Saturday the 28th is expected to be 19c, which is expected to be as warm as mid-April. In many other areas, the weather will be similar to late March to mid-April. Since the temperature can vary greatly throughout the day, it would be a good idea to choose clothes that are easy to adjust.
As the snow continues to melt in snowy areas, please continue to be careful of snow falling from roofs and avalanches.

As the month changes to March, low pressure systems and fronts are likely to pass through, and temperatures are likely to gradually return to normal.

Weather for today, the 26th (Thursday): The weather is improving in various places, but the sky looks like clouds are likely to spread in Kanto and other areas

2026/02/26 06:25

Today, the 26th (Thursday), the low pressure system and front that brought widespread rain yesterday (25th) are expected to move away to the east, and the area around Japan is expected to be covered by high pressure. The weather will improve in many places, but the sky is likely to be dominated by clouds in areas such as the Kanto region.



From Hokkaido to the Japan Sea side of Tohoku and Hokuriku, there are many places where the sun will reach and it will be sunny. Please continue to pay attention to melting snow in areas with heavy snowfall.

Moist northeast winds flow into the Pacific Ocean side of the southern Tohoku region and the Kanto region, so clouds tend to spread across the sky. There is a possibility of showers in the Tohoku region, so it is best to bring rain gear when going out.

Western Japan has periods of cloudy weather, but most of the time it will be sunny. It looks like the weather will be pleasant and sunny during the day, as warm as early April. In Kyushu, the rain spreads from late at night, so if you are returning late, it is best to bring rain gear.

Weather for the week Weather changes periodically over the next week Rain every few days

2026/02/25 13:05

From now on, until around Wednesday, March 4th next week, the weather will change periodically, and it looks like there will be many places where it rains every few days.

Today, the 25th (Wednesday), rain is falling over a wide area from Okinawa to Tohoku due to the influence of a front stationary on the southern coast of Honshu and a low pressure system moving eastward near Kyushu. Hokkaido is covered in high pressure and is mostly sunny.

After this, the front on the southern coast of Honshu will move south until the 26th (Thursday), and the weather will improve in many places, but there will still be some rain in the Kanto region until tomorrow morning.





The next day, on the 27th (Friday), rain will fall in central western Japan until the 28th (Saturday) due to the influence of a low pressure system forming near the East China Sea. On the Pacific side, there are likely to be some places in northern and eastern Japan where it will rain due to the influence of a low pressure system moving north off the coast of Sanriku.

On Sunday, March 1st, there will be high pressure from the north, and it will be sunny in many places.
On the 2nd (Monday) at the beginning of the week, the weather is likely to go downhill again from the west due to the influence of another low pressure system moving eastward from the continent. It looks like there will be widespread rain on the 3rd (Tuesday).

The rain is likely to be a blessing to the Pacific side of eastern Japan and western Japan, where there has been little precipitation so far, but it is likely that there will be localized areas near fronts and cyclone centers, so we need to be careful about how the rain falls.

Temperatures are expected to be higher than normal through early March. Especially from tomorrow until the 28th (Saturday), temperatures in many places will be similar to April.

Also, the amount of pollen scattered increases after rain. If you are sensitive to pollen, please check the latest information and take precautions such as wearing a mask and glasses when going out.

Widespread rain and snow, with some places experiencing heavy rain accompanied by thunder on the Pacific side of eastern and western Japan.

2026/02/25 09:49

A front extends from the eastern seaboard of Japan, through the southern coast of Honshu, Shikoku and Kyushu, and into the East China Sea.
Also, there is a low pressure area near Kyushu on the front that is moving east.

Currently, it is sunny in some parts of Hokkaido, but it is snowing and raining in Tohoku, it is raining widely in eastern and western Japan and the Okinawa region, and there are areas in Kyushu where storm warnings have been issued.





Today, the front will remain stationary on the southern coast of Honshu, and a low pressure system will move eastward above the front.
Rain will fall over a wide area from Okinawa to Tohoku, and there is a risk of heavy rain accompanied by thunder mainly on the Pacific side.
Also, when a low pressure system passes, the wind will become stronger, so be careful.

In the northern Tohoku region, there will be snow in some places, especially along the mountains.
It is expected to be sunny in many places in Hokkaido.
The daytime temperature will be lower than yesterday in many places, but it will be around normal or slightly higher.





Tomorrow, the front is expected to continue from the Tokai region to the Kanto region and extend into the southern seas of Japan, but it will move further south from today.
In the Kanto region, there are likely to be some areas where the front is near and it will rain, but in other areas, it will likely be sunny or cloudy.

The day after tomorrow, a low pressure system and a front are expected to approach from the west again.
As a result, there will be many places where it will rain.

Warm season forecast: Summer temperatures will rise nationwide

2026/02/24 16:37

The Japan Meteorological Agency today (Tuesday), the 24th, announced the ``warm weather forecast,'' which provides an outlook on the weather for the summer (June to August).
This summer, temperatures will be high nationwide as the country is likely to be covered in warm air. Rainfall in the summer and during the rainy season is expected to be near normal across the country.



There is a possibility that an El Nino phenomenon will occur this summer, and sea surface temperatures are expected to rise in the eastern to central equatorial Pacific Ocean. It is also expected to be low in the southeastern part of the tropical Indian Ocean. For this reason, cumulonimbus clouds will be more likely to occur near the international date line in the equatorial Pacific Ocean and over the sea east of the Philippines, but less likely to occur near Indonesia.
As a result of these effects, upper-level westerly winds are expected to flow southerly than normal over the Eurasian continent, but slightly northerly than normal near Japan. Although the Tibetan anticyclone's overhang to the north is weak, its overhang near Japan is likely to be about normal. Additionally, the Pacific anticyclone's overhang near Honshu will be somewhat strong, and its overhang south of Japan will be somewhat weak.
For this reason, the area around Japan is expected to be covered in warm air.



The average temperature in summer (June to August) is expected to be high nationwide.
Last summer was the third consecutive year of record high temperatures, breaking the record for the highest temperature in Japan. This summer is likely to be extremely hot again, so we need to be careful.

Precipitation is expected to be about normal in both summer (June to August) and the rainy season (June to July in northern, eastern and western Japan, and May to June in Okinawa and Amami).
Last year, the rainy season ended in June in many places, and eastern Japan experienced a record amount of sunshine. This year is likely to be about normal, but we need to be careful as there is a risk of heavy rain during the rainy season when the seasonal rain front becomes more active. Please check the latest weather information and prepare for heavy rain disasters.

2nd Cherry Blossom Bloom Forecast: Expected blooming to start from Tokyo in eastern Japan and Kochi in western Japan

2026/02/24 08:12

Our company Sunny Spot is pleased to announce the second cherry blossom bloom forecast. Please use this information to plan cherry blossom viewing from next March onwards.



From December of last year to mid-January of this year, we experienced a winter-like atmospheric pressure pattern intermittently. Especially after mid-January, a strong cold wave brought severe cold to the entire country, and by early February, it snowed in some places in the Kanto region. For this reason, it is thought that the dormancy break necessary for the cherry blossoms to bloom has been sufficient.

In March, average temperatures in western Japan are expected to be around normal or slightly higher than normal. In eastern Japan, temperatures are expected to remain around normal to above normal. In northern Japan, temperatures are expected to be higher than normal from March to April.

For this reason, cherry blossoms will bloom earlier than normal in many places in northern Japan in 2026. In areas west of the Kanto region, weather is expected to be at or slightly earlier than normal in many places.



In eastern Japan, cherry blossoms are expected to start blooming from Tokyo, and at our Sunny Spot, we expect them to start blooming around March 21st. In western Japan, blooming is expected to begin around March 20th in Kochi, Shikoku, around March 21st in Fukuoka, and around March 26th in Osaka.

Blooming will progress in Hokuriku in early April, and the cherry blossom front will gradually move northward. The expected flowering date in Niigata is around April 6th, and in Sendai around April 4th. In Hokkaido, the flowers are expected to start blooming in Hakodate around April 20th.

In many places from western to eastern Japan, the flowers reach full bloom approximately one week after flowering. Many places are likely to have their best time to see them, around the time of entrance ceremonies and the start of new life in early April.
In northern Japan, the period from flowering to full bloom is short, and the time of full bloom is likely to be earlier than normal in many places.

After the holidays, the weather will go downhill from the west. Tomorrow, the 25th (Wednesday), there will be heavy rain over a wide area.

2026/02/24 07:21

Today, the 24th (Tuesday), the end of the holidays, a front and a low pressure system above the front are expected to gradually approach Honshu from the west.

In Hokkaido, there are places where it snows from morning until noon, and in northern Hokkaido, there are likely to be snowstorms. Please be aware of deteriorating outlook. The snow will gradually stop in many places.



Meanwhile, rain clouds are expected to gradually develop from the East China Sea. In western Japan, it will start raining in the afternoon, and there will be some places with thunder. Parts of Kyushu, including Nagasaki Prefecture, may experience heavy rain of more than 30mm per hour.
It is likely that showers will occur in places from the Tokai region to the Tohoku region late at night. It might be a good idea to bring an umbrella with you in case you get home late. In the northern Tohoku region, snow will fall in some places tonight, including Aomori and Akita prefectures.



Tomorrow, the 25th (Wednesday), the area of rain is expected to spread further from Tohoku to Kyushu. There will be heavy rain mainly from western Japan to the Pacific side of eastern Japan, and there will be heavy rain with localized thunderstorms. In western Japan, the area of rain is likely to gradually narrow into the afternoon, but from the Kanto region to the Tokai region, it is expected to continue raining for a long time until the new date.

From western Japan to the Pacific Ocean side of Tohoku, areas that have not had much rain in the past have experienced heavy rain for the first time in a while, and it looks like it will be a blessing. However, you will need to be careful about how the rain falls, as the rain will become heavier with localized thunderstorms.
In addition, temperatures will continue to be higher than normal, and snow melting will continue in areas with heavy snowfall. Please be careful of avalanches, falling snow from roofs, and deteriorating road conditions.

On the Emperor's birthday, temperatures drop mainly on the Sea of Japan side; Kanto is warm and Tokyo is as cheerful as early May.

2026/02/23 07:18

Yesterday (22nd), warm air from the south flowed into the Japanese archipelago, causing temperatures to rise across the country. In Kyushu, some places other than islands such as Okinawa experienced summer days for the first time in the country this season.



Today, the 23rd (Monday), as a cold front will pass, winds will blow from the north in many places, and temperatures will drop in many places compared to the previous day. Although many places will be warmer than normal, it will likely be a day with a large temperature difference from the previous day. On the other hand, the Kanto region is warm due to the wind blowing from the south, and in central Tokyo it is as warm as early May, making it unseasonably sunny. You can spend the day without needing a jacket.

The predicted maximum temperature is Sapporo: 5c, Sendai: 15c, Tokyo: 22c, Nagoya: 18c, Kanazawa: 12c, Osaka: 18c, Kochi: 21c, Fukuoka: 14c.

In addition to the temperature difference from the previous day, which was unseasonably warm except in the Kanto region, the temperature difference throughout the day will also be large. Please take care of your health by choosing clothes that are easy to adjust.